Signal to be worn on a thumb



FIG. 1 is a left side elevational view of a signal to be worn on a thumb showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a right side elevational view of a second embodiment of the design of FIG. 1, the only difference being the increase in the length of the nail;

FIG. 8 is a left, front perspective view of a third embodiment, the only difference being the configuration and size of the nail. 

The ornamental design for a signal to be worn on a thumb, as shown and described. 